This re-usable cleaning system features a chrome-plated trigger valve that can be screwed onto 10-oz. refill cans of compressed air. Can save you money over a period of time compared to using traditional throw-away air dusters. 100% 1,1,1,2-tetrafluoroethane (HFC) gas. Contains no CFCs or HCFCs and has a zero (stratospheric) ozone depletion potential (ODP). Nonabrasive; safe for most materials. Ultra-pure; leaves no residue. Non-flammable. Sprays in any direction with 36" flexible extension tube attachment.